A small (but imho very handy) feature suggestion:
Ability to use *.wz4 file location as the basis for searching assets i.e. using relative file paths. I think of it as an option in wz preferences.
It should work like this: Say, I want to share with you a file with assets (imported models, textures, *.ogg, etc.). I zip the entire project folder and send it to you. You unzip the folder, open the wz4 file and you don't have to adjust the project folder path in Document options. Assets are found automatically based on the location of the *.wz4 file.